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Usage:
asin(x [, degrees:T or radians:T or cycles:T]), x REAL or a structure
with REAL components value in radians (default), cycles, or degrees as
specified by option "angles" or the optional keyword
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Keywords:
transformations
asin(x) computes the inverse sine of the elements of x, where x is a
REAL scalar, vector, matrix or array. The result has the same shape as
x. sin(asin(x)) is the same as x except for rounding error.
The units of the result are radians, degrees or cycles as determined by
the value of option 'angles'. The default is radians. See subtopic
'options:"angles"'.
asin(x, radians:T), asin(x, degrees:T), asin(x, cycles:T) return results
in the indicated units, regardless of the value of option 'angles'.
When any element of x is MISSING or is above 1 or below -1, the
corresponding element of the result is MISSING and a warning message is
printed.
When x is a structure, all of whose non-structure components are REAL,
asin(x [,UNITS:T]), where UNITS is one of 'radians', 'degrees' or
'cycles', is a structure of the same shape and with the same component
names as x with each non-structure component transformed by asin().
Cmd> vector(asin(.5),asin(.5,degrees:T),asin(.5,cycles:T))
(1) 0.5236 30 0.083333
See topic 'transformations' for information on asin().
Gary Oehlert
2003-01-15